POWELL, Arthur Belford. Reaching back to advance forward: towards a 21st century approach to learning and teaching fractions. Perspectiva, [S. l.], v. 36, n. 2, p. 399–420, 2018. DOI: 10.5007/2175-795X.2018v36n2p399. Disponível em: https://periodicos.ufsc.br/index.php/perspectiva/article/view/2175-795X.2018v36n2p399. Acesso em: 1 juill. 2024.